This module provides operations on the type int64 of
signed 64-bit integers. Unlike the built-in int type,
the type int64 is guaranteed to be exactly 64-bit wide on all
platforms. All arithmetic operations over int64 are taken
modulo 264

Performance notice: values of type int64 occupy more memory
space than values of type int, and arithmetic operations on
int64 are generally slower than those on int. Use int64
only when the application requires exact 64-bit arithmetic.

val zero : int64

The 64-bit integer 0.

val one : int64

The 64-bit integer 1.

val minus_one : int64

The 64-bit integer -1.

val neg : int64 -> int64

Unary negation.

val add : int64 -> int64 -> int64

Addition.

val sub : int64 -> int64 -> int64

Subtraction.

val mul : int64 -> int64 -> int64

Multiplication.

val div : int64 -> int64 -> int64

Integer division. Raise Division_by_zero if the second
argument is zero. This division rounds the real quotient of
its arguments towards zero, as specified for (/).

Int64.shift_left x y shifts x to the left by y bits.
The result is unspecified if y < 0 or y >= 64.

val shift_right : int64 -> int -> int64

Int64.shift_right x y shifts x to the right by y bits.
This is an arithmetic shift: the sign bit of x is replicated
and inserted in the vacated bits.
The result is unspecified if y < 0 or y >= 64.

val shift_right_logical : int64 -> int -> int64

Int64.shift_right_logical x y shifts x to the right by y bits.
This is a logical shift: zeroes are inserted in the vacated bits
regardless of the sign of x.
The result is unspecified if y < 0 or y >= 64.

val of_int : int -> int64

Convert the given integer (type int) to a 64-bit integer
(type int64).

val to_int : int64 -> int

Convert the given 64-bit integer (type int64) to an
integer (type int). On 64-bit platforms, the 64-bit integer
is taken modulo 263, i.e. the high-order bit is lost
during the conversion. On 32-bit platforms, the 64-bit integer
is taken modulo 231, i.e. the top 33 bits are lost
during the conversion.

val of_float : float -> int64

Convert the given floating-point number to a 64-bit integer,
discarding the fractional part (truncate towards 0).
The result of the conversion is undefined if, after truncation,
the number is outside the range [Int64.min_int, Int64.max_int].

val to_float : int64 -> float

Convert the given 64-bit integer to a floating-point number.

val of_int32 : int32 -> int64

Convert the given 32-bit integer (type int32)
to a 64-bit integer (type int64).

val to_int32 : int64 -> int32

Convert the given 64-bit integer (type int64) to a
32-bit integer (type int32). The 64-bit integer
is taken modulo 232, i.e. the top 32 bits are lost
during the conversion.

val of_nativeint : nativeint -> int64

Convert the given native integer (type nativeint)
to a 64-bit integer (type int64).

val to_nativeint : int64 -> nativeint

Convert the given 64-bit integer (type int64) to a
native integer. On 32-bit platforms, the 64-bit integer
is taken modulo 232. On 64-bit platforms,
the conversion is exact.

val of_string : string -> int64

Convert the given string to a 64-bit integer.
The string is read in decimal (by default) or in hexadecimal,
octal or binary if the string begins with 0x, 0o or 0b
respectively.
Raise Failure"int_of_string" if the given string is not
a valid representation of an integer, or if the integer represented
exceeds the range of integers representable in type int64.

val to_string : int64 -> string

Return the string representation of its argument, in decimal.

val bits_of_float : float -> int64

Return the internal representation of the given float according
to the IEEE 754 floating-point ``double format'' bit layout.
Bit 63 of the result represents the sign of the float;
bits 62 to 52 represent the (biased) exponent; bits 51 to 0
represent the mantissa.

val float_of_bits : int64 -> float

Return the floating-point number whose internal representation,
according to the IEEE 754 floating-point ``double format'' bit layout,
is the given int64.

The comparison function for 64-bit integers, with the same specification as
compare. Along with the type t, this function compare
allows the module Int64 to be passed as argument to the functors
Set.Make and Map.Make.